/*
 *
 *  *  Copyright (c) 2019-2020, 冷冷 (wangiegie@gmail.com).
 *  *  <p>
 *  *  Licensed under the GNU Lesser General Public License 3.0 (the "License");
 *  *  you may not use this file except in compliance with the License.
 *  *  You may obtain a copy of the License at
 *  *  <p>
 *  * https://www.gnu.org/licenses/lgpl.html
 *  *  <p>
 *  * Unless required by applicable law or agreed to in writing, software
 *  * distributed under the License is distributed on an "AS IS" BASIS,
 *  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  * See the License for the specific language governing permissions and
 *  * limitations under the License.
 *
 */

package com.cqy.resource1.config;

import feign.RequestTemplate;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.security.oauth2.client.AccessTokenContextRelay;
import org.springframework.cloud.security.oauth2.client.feign.OAuth2FeignRequestInterceptor;
import org.springframework.security.oauth2.client.OAuth2ClientContext;
import org.springframework.security.oauth2.client.resource.OAuth2ProtectedResourceDetails;

/**
 * @author lengleng
 * @date 2019/2/1
 * 扩展OAuth2FeignRequestInterceptor
 */
@Slf4j
public class PigFeignClientInterceptor extends OAuth2FeignRequestInterceptor {
    private final OAuth2ClientContext oAuth2ClientContext;
    private final AccessTokenContextRelay accessTokenContextRelay;

    /**
     * Default constructor which uses the provided OAuth2ClientContext and Bearer tokens
     * within Authorization header
     *
     * @param oAuth2ClientContext     provided context
     * @param resource                type of resource to be accessed
     * @param accessTokenContextRelay
     */
    public PigFeignClientInterceptor(OAuth2ClientContext oAuth2ClientContext
            , OAuth2ProtectedResourceDetails resource, AccessTokenContextRelay accessTokenContextRelay) {
        super(oAuth2ClientContext, resource);
        this.oAuth2ClientContext = oAuth2ClientContext;
        this.accessTokenContextRelay = accessTokenContextRelay;
    }


    /**
     * Create a template with the header of provided name and extracted extract
     * 1. 如果使用 非web 请求，header 区别
     * 2. 根据authentication 还原请求token
     *
     * @param template
     */
    @Override
    public void apply(RequestTemplate template) {

        accessTokenContextRelay.copyToken();
        if (oAuth2ClientContext != null
                && oAuth2ClientContext.getAccessToken() != null) {
            super.apply(template);
        }
    }
}
